Dental disk-carrier



(No Model.)

G. B. RICHMOND. DENTAL DISKUARRIER. No. 518,701. Patented A791224, 1894.

n l Y UNTTED STATES" PATENT i/Orrrcn.

GEORGE B. RICHMOND, OF LANSING, MICHIGAN.

DENTAL DISK-CARRIER.

SPECIFICATION forming part of Letters Patent No. 518,701, dated April 24, 1894.

Application filed September 15, 1893. Serial No. 485,607. (No modelf) i To a/ZZ whom it may concern,.-

Be it known that I, GEORGE B. RICHMOND, a citizen of the United States, residing at Lansing, Ingham county,State of Michigan, have invented certain new and useful Improvements in Dental Disk-Carriers, of which the following is a speciiication.

My invention relates to den tal disk-ca rriers, and it has for its object to provide a disk-carrier which shall be simple, cheap and eective, and to which the disk can be quickly and securely attached, as well as to provide a carrier which may be quickly and readily applied to the ordinary and usual forms of dental mandrels now in the market,an'd to these ends my invention consists in a disk-carrier embodying the features of construction and arrangement, and having the mode of operation substantially as hereinafter more particularly set forth.

Referring to the accompanying drawings, in which I have illustrated various embodi ments of the general principle of my invention, Figure 1, is a side view, partly in section, of the ordinary mandrel, and my improved disk-carrier, with the disk connected therewith. Fig. 2, is an enlarged side view of the ordinary mandrel commonly' used in dental engines. Fig. 3, is an enlarged vertical section of my improved disk-carrier. Fig. 4, is a plan view of the same. Fig. 5, is an enlarged view of the plate; and Fig. 6, is a similar enlarged view of the spring; while Fig. 7, is a plan view, showing the spring and plate together. Figs. 8 and 9 are enlarged, sectional views showing modilied arrangements of my disk-carrier.

It is well known to the art that it is common in the practice of dentistry to use abrading disks made of some suitable material, oftenof paper coated with abrading material, and these disks are furnished to the trade in standard sizes Vand qualities of neness or coarseness of the abrading material, and it becomes important to provide some simple and effective means whereby the disks can be quickly applied to and removed from the mandrel or other appliance, which is usuallyconnected with the dental engine for rotating the disks, and it is the object of my inven tion to provide such a disk-carrier, which is complete in itself and isadapted to be attached to the ordinary forms of mandrels generally used, and which is further constructed so that the disk of the desired quality and size can be quickly attached to the carrier for use, and detached when worn, or its use dispensed with.

In the accompanying drawings, A represents one of the best known forms of mandrels adapted to be used with dental engines, and this mandrel is provided at one end with a screw-threaded socket a, of the standard gage, which is adapted to receive various kinds and styles of tools, for diiferent dental operations, and I, therefore, make my disk-carrier of such a construction and size that it will readily ht the screw-threaded socket of the mandrel.

The disk-carrier, which is shown enlarged in Fig. 3, consists essentially of i a screwthreaded stem B, of a size and form adapted to fit the screw-threaded socket a.,`in the mandrel, and mounted on the end of this stem is a plate C, `this plate being adapted to slide on the portion b of the stem. Also mounted on this portion of the stem is a spring D, which is shown in the present instance as being made of spring material, and having four arms proj ecting` outward and extending to and bearing on the side of the plate C near its periphery, and while I have found this to be a most satisfactory form of spring for the purposes intended, it is evident `that any other form which will accomplish the purposes, may be used.

In order to hold the spring and form a bearing therefor, the stem is provided with an enlargement or collar b. This enlargement or collar also furnishes a bearing or stop-piece to the screw when it is applied to the screw-threaded socket of the mandrel.

Also mounted on the stem of the carrieris a spring arm or bearing-piece E, and` this is shown as having a curved or ring-like body portion e, and a bent portion e', which extends from the center of the stem .outward to the body portion, and this is secured to the stern in any suitable Way, it being shown as having a bent portion e2, secured in a socket in the end of the stem by solder, or anyother well-known Way. This arm is .preferably made in the form shown, in which the body portion is of a size nearly corresponding with the periphery of the plate O. It may, how- IOO ever, be of greater or less diameter, and may be formed more in accordance with a true spiral, extending from the center of the stem outward, but for obvious reasons, a true spiral is not as satisfactory in practice as the form shown, as this latter form furnishes a more substantial bearing surface upon the disk F, practically clamping it against the face of the plate C throughout its circumference. The free end e3, of the arm or bearingpiece, is preferably bent upward slightly and outward tangentially from the true circle, in order that the disk may be more readily applied, in the manner hereinafter set forth.

It will be understood that the curved arm or bearing-piece is mounted on the stem in such relations that when the mandrel is ro' tated in the usual direction, the point or end of the arm will be in the rear, so there will be no danger of its point impinging upon any obstruction, as the instruments, or teeth, or other appliance used in connection therewith. Such being the preferred construction of the carrier, its operation and use will be readily understood by those skilled in the art, and it may be remarked that the disks F usually supplied to the-trade, whatever may be their sizeand thickness, are provided with central openings of a uniform size, and my device is adapted to 'be used with this most simple and practical form of disk, without any additional holes or other appliances for securing it to the carrier.

In attaching the disk to the carrier, the central opening is applied to the point or end e3, of the bearing-piece, and the piece or disk is turned in the proper 'direction and the plate C will yield, compressing the spring D sufciently to accommodate the thickness of the disk used and allow it to be applied, so that its central opening will t over the portion b of the stem, which will form a practical hub for the disk, accurately centering it in tho carrier. It will thus be seen that the arm or bearing-piece E has passed completely through the opening in the disk, so that the arm lies on top and parallel with its upper surface, while the opposite face of the disk lies parallel lto and bears upon the upper face of the plate C, and the spring D forces the arm or bearing-piece and the plate together, clamping the disk sufliciently to insure its proper rotation in use.

It will be observed that in making the arm or bearing piece substantially annular in shape, it furnishes a satisfactory and ample bearing to clamp the disk in position and maintain it in its proper position, it being practically clamped between the face of the plate near its periphery and the bearing-piece at a distance from its center, so that it is not only held in place, but the tension of the clamp bears practically on all parts, so that there is no liability to strain or tearing of the disk in rotating the same. At the same time, it will be observed that by having the spring D properly adjusted, the disk will not be so tightly clamped that it will be torn if'it meets with too great an obstruction, but it being held frictionally between the bearing-piece and plate under spring pressure, it may if occasion arises, slip between the clamping portions before it would be torn or destroyed.

When the disk'is worn out, it can be quickly removed, as by tearing it off, preferi'ably by pulling it in a direction toward the straight portion e of the bearing-piece, as this will cause it to be displaced from its hub and ride up on the portion e, and when, if desired, by turning the bearing-piece or disk, it may be readily removed, while again it is in a position when it can be readily torn from the head of the carrier.

It will be seen that the carrier is a complete article of manufacture in itself, and the disk may be applied to the carrier while it is separated from the mandrel, or after it has been secured to the screw-threaded socket thereof. The carrier can be manufactured and sold and the trade supplied in the same manner that the disks are now supplied to the trade, and it can be used with the various mandrels now in use, in connection with the so-called dental engines.

In Fig. 8 I have shown another means of accomplishing substantially the same result, in which the stem B is adapted to it in the ordinary mandrel, and loosely mounted on the hub is a plate C, and the spring bearing-piece or arm E is attached to the hub, substantially as in the construction before described. Connected to the inner portion of the stem B is a spring G, shown as a spiral spring, one end of which being secured to the hub, while the other end is adapted to be secured in the socket of the mandrel in any suitable way, as for instance, by the application of a little soft solder. The end e2 of the bearing-piece is preferably extended slightly beyond the stem to furnish a convenient attachment for the end of the spiral spring, although it is evident that the spring may be attached in any other desired way. With this construction it will be seen that when the disk is applied in the manner before set forth, the spring will yield, and the hub and bearingpiece will yield sufciently to allow the disk to be readily applied, and when it is in position, the tension of the spring G will cause the bearing-piece to clamp the disk between it and the plate C, as before.

In Fig. 9, I have shown another modified form of carrier adapted to be used with the ordinary mandrel, in which the stem B is screw-threaded to iitthe screw-threaded socket a of the mandrel, and is provided with the plate C, which in this instance, is secured to f or formed integral with the stem. Projecting beyond the plate is a hub b. This stem is provided with a screw-threaded opening b2, extending entirely through it, in which is fit- IOO IIO

ted a screw H, one end of which is attached to the inner portion of the spring arm or bearing-piece E while the other end is provided with a nut h, orother device for limiting the movement of the screw, in its outward direction. With this construction it will be seen that when it is desired to apply the disk, the bearing-piece and its attached screw H are turned outward,and the disk applied to the bearing-piece, in the manner before described, until it is firmly tted on its hub b, and it will be observed that the curvature of the arm or bearing-piece is such that the act of applying the disk tends to turn the screw H outward, but it is limited in its movement by the nut or' other device h. When the disk is in place, the bearing-piece E is turned in the opposite direction, and the screw H screwed inward until the bearing-piece is drawn `firmly against the disk, holding `it in position against the plate C, as before. It will thus be seen that my disk-carrier is exceedingly simple in construction, that it is adapted to be used in connection with the ordinary disks of commerce, that these disks can be quickly applied and removed from the carrier, and when applied are held irmly and evenly thereby, but are allowed to yield under great tension, and that the carrier is adapted to be used with the ordinary mandrels in common use. p A

While I have thus described the principles of my invention and illustrated various embodiments thereof, it will be understood that .iied by those skilled in the art without departing from the spirit of the invention.

What I claim is-m l. A dental disk-carrier provided with a curved spring arm having an inward extension to the center of the disk, the curved portion. and the inward extension being in the same plane, substantially as described.

2. A dentaldisk-carrier, comprisinga screwthreaded stem having a hub at one end, a plate having a plain surface sliding on the hub, a bearing piece or arm secured to the stem and arranged parallel with `the plate, and a spring mounted on the hub and bearing on the plate, substantially as described.

3. A dental disk-carrier, comprising a stem D, a plate C, a curved spring arm or bearing piece E having an inward extension e secured to the stem, and a free end e3, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

. GEORGE B. RICHMOND.

Witnesses:

F. L. FREEMAN, AM. N. DoBsoN. 

